restore_mailbox_snapshot
Restore mailbox from backup snapshot
This record as markdown: /tools/cbrown35-20i-mcp/restore-mailbox-snapshot.md
What restore_mailbox_snapshot does on 20i MCP Server
AI agents use restore_mailbox_snapshot to create or update resources in 20i MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 20i MCP Server environment.
Why restore_mailbox_snapshot is rated Medium
This tool restores mailbox data from a backup, which constitutes a Write operation (creates/modifies data reversibly). While restoration can affect email availability and user experience significantly, it is not Destructive because the previous state remains in backups and the operation can be reversed by restoring to a different snapshot. It is not Execute because it does not run arbitrary code or commands.
From the tool's definition Tool name and description indicate it 'restore mailbox from backup snapshot' - this modifies email data by overwriting current mailbox contents with a previous snapshot state, which is a reversible data modification operation.
Attacks that exploit this kind of access
The rule that runs restore_mailbox_snapshot safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 20i MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For restore_mailbox_snapshot, this is the rule to start with:
restore_mailbox_snapshot stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 20i MCP Server, apply this rule, and every restore_mailbox_snapshot call is checked against it from then on.
Questions about restore_mailbox_snapshot
Restore mailbox from backup snapshot. It is categorised as a Write tool in the 20i MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the 20i MCP Server MCP server in PolicyLayer and add a rule for restore_mailbox_snapshot: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches 20i MCP Server. Nothing to install.
restore_mailbox_snapshot is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the restore_mailbox_snapshot rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for restore_mailbox_snapshot. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
restore_mailbox_snapshot is provided by the 20i MCP Server MCP server (cbrown35/20i-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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